[sdiy] Quantizer project.. incoming CV's switching point to change to quantized output CV's ...

Brian Willoughby brianw at audiobanshee.com
Wed Jul 7 07:25:27 CEST 2021

I don't know that it's a given that equal time for unequal scales would be musical. It's certainly not necessarily natural.

If you're playing a sitar with the frets moved into non-chromatic intervals and slide your finger up and down the string, the amount of time for each note will not be the same. You can bend the strings, but you can't bend the physics of the strings.

I see your point that it might be desirable to have each output note take the same amount of time, but that might be asking a lot from such a nonlinear system.


On Jul 5, 2021, at 17:07, Jean-Pierre Desrochers <jpdesroc at oricom.ca> wrote:
> This a very good point..
> And the "equal voltage invervals between each note" approach
> seems easier to implement in code using a lookup table with
> a ‘definition’ for each scale..
> This approach will effectively give a scale the same ‘luck to be played’
> for all of its notes. And is less picky on the threshold voltage precision.
> I’ll keep note of this. Thanks !
> De : David G Dixon [mailto:dixon at mail.ubc.ca] 
> Envoyé : 5 juillet 2021 19:43
> À : 'Jean-Pierre Desrochers'; 'SDIY'
> Objet : RE: [sdiy] Quantizer project.. incoming CV's switching point to change to quantized output CV's ...
> I don't know diddly-squat about code, but I've been working on an analog quantizer with logic for generating various scales, and I must say that I'm a strong advocate of the "equal voltage invervals between each note" approach.
> Of course, for the chromatic scale, this is a no-brainer: 83.33 mV per note.  However, if you want to quantize a major triad, I would use 333.33 mV per note.  For a major scale, 142.86 mV per note.  Et cetera.
> Why?  Because if you are running the scales or arpeggios by playing the quantizer with a triangle wave LFO, you will want each note to last for the same amount of time.  Any other approach will impose a rhythm that will favour notes that are farther away in pitch from the others.
> As usual, the right answer is the musical one, not the technical one.

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